Hotel-lock, emergency-cylinder.



. A. ARENS & E. L. THIGH.

HOTEL LOOK, EMERGENCY CYLINDER. APPLICATION FILED 111 11.27, 1910. 1

987,346 Patented Mar.28, 1911. ZSHEETS-SHBBT l.

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v 4 8 I an 6 I A. ARENS & 'E. L. THIGH.

HOTEL LOOK, EMERGENCY CYLINDER. APPLICATION FILED APE.27, 1 910.

Patented Mar. 28,1911.

2 SHEETS-SHEET 2.

Eli. 72 1 I J exact description. 1o

be dead-locked from the inside in such manconstruction of lock of theso-called cylinder latch bolt may under normal conditions be is asideview of the emergency key showing consists in the construction andarrange- TEICH, or TO 1*. & 1F. 0033111, on NEW BRITAIN,

NECTICUT.

ToaZZ whom it may concern:

Be it known that we, AUGUST ARENS and ERNEST L. TEICH, citizens of theUnited States, residing, at New Britain, county of Hartford, State ofConnecticut, have in,- vented certain new and useful Improvements inHotel-Locks, Emergency-Cylinder, of which the following is a .full,clear, and

Our invention relates to so-called hotel corridor locks, and isparticularly concerned with mechanism whereby the latch bolt may nerthat said bolt can not be operated from the outside except by the use ofa' key of particular construction commonly known as an emergencyv key.

Tothis end the" invention contemplates a type in which the key-operableplug of the cylinder is so constructed that while the retracted by anyof applurality of keys, such as the guest, master 'and grand masterkeys, said latch bolt when locked by theinside dead-locking mechanismcan'only"be operatedby a so-called emergency-key.

With these objects in View the invention ment of parts, a preferredembodiment of which is illustrated in the accompanying drawings, inwhich I gure 1 is a side view of the lock with the cap plate removed;Fig. 2 is a fragmentaryiview of the look similar to Fig. 1, showing' theinside dead-locking mechanism in dead-locking position; Fig. 3 is asectional view on the line 3-3 Fig. 1, showing also a portion of thelocking cylinder; Fig. 4 is a longitudinal sectional ,view of thelocking cylinder and key-operated plug showing the position of the pintumbler when operated by one of the ordinary keys. Fig. 4 is a viewsimilar to Fig. 4 showing the position of the pin tumbler when operatedby the emergency key. Figs. 5, 6 and 7 are inner end views of thecylinder showing the locking cam in its several operating positions;Fig. 8 comprises an edge and side View respectively of the insidedead-locking mem-' ber for dead-locking the latch bolt; Fig. 9

thebitting for operating the pin tumbler of the emergency cylinder, andFig. 10 is a similar View of one of. the other keys of the HOTEL-1300K,EMERGENCY-CYLINDER.

Specification of Lettersl'atent. Application filed April 27, 1910.Serial No. 558,028."

BRITAIN, CONNECTICUT, AS SIGNORS NEW CONNECTICUT, A CORPORATION OF CON-Patented Mar. 28. 1911.

series, for example, the master keyshowing the bittlng which preventsoperative positioning of the emergency pin tumbler.

- mounted.

5 indicates the. latch bolt, which is provided with a stem 6 having atail piece 7 to be engaged by the cam arm of the cylinder lock. The stem6 of the latch bolt carries a coiled spring 8 bearing at one end againstthe head of the bolt and at the opposite end against an abutment 9 tonormally project said bolt;

In the rear of the lock case is mounted an inside dead-locking member10, having an arm 11, which,'when said deadlocking member is in normalposition", lies opposite a notch 12 in the tail piece 7, whereby thelatch bolt may be freely retracted without interference of thedeadlocking member by any of the series of keys above mentioned. ber isbe engaged by a roll-back 14, which is operated by a suitable thumb.latch (not shown) from the inside of the'door. The roll-back 14 isprovided with cam faces 15 and 16 respectively, arranged to be engagedby a spring 17 to hold said roll-back in either of 1ts positions.

Referringto Figs. 4 and 4 itwill be seen that the lock cylinder is ofthe duplex plug type, that is to say, said cylinder consists of a caslng18 having the usual pin tumbler mechanism '19, which cooperates with theinside key-operated plug 20, to which the cam arm 21 is secured at itsinner end, and also with a cylindrical key-operated plugsurslidablyrounding the plug 20 and comprising" two v sections 22 and 23. Thesection 22 is of the usual construction to provide for an increasednumber ofpermutations of the lock, and is controlled by the pin tumblermechanism 19, whereby a series of keys may be employed therewith, suchas a guest, master and grand master key. Any one of the keys justmentioned will serve to release the inside key-operated plug 20 and theoutside plug section 22 from the pin tumblers -19,

in order to permit of rotation of the cam arm 21 for normal operation ofthe latch so" The dead-locking'memprovided with a notch 13 adapted toloo the tail piece 7 .ofthe latter. For such normal operation the insidelocking plug is rotated clockwise (as viewed in Fig. 6). Reversemovement of the inside locking plug by any of the keys just mentioned isprevented, however, by-a in 24 secured to the inner end of the cylinrical plug section 23 and engaging a shoulder 21 on the head of the camarm 21, which section 23 remains stationary when the inside plug only isoperated by any of the three keys just mentioned, This for the reasonthat'said keys are so bitted that they cannot operatively position thepin tumbler 19* which controls the inner or emergency cylindrical plugsec tion 23. When the dead-locking member 10 is raised to dead-lockingposition, as shown in Fig. 2, the arm 11 of said member stands behind ashoulder 7 on the latch bolt tail piece, whereby operation of the latchboltby any of the three keys mentioned will ob viously be prevented.

In case it is necessary to unlock the door from the outside when thelatch bolt is blocked fromthe inside by the dead-locking mechanism,meansare provided whereby the dead-locking member 10 may be returned toinoperative position by operation from the outside by the so-calledemergency key. To

this end the dead-locking member is provided with a lug 25 and theso-called emergency key is so bitted that it is adapted ,to

operatively position the pin tumbler 19 of the locking plug section 23which carries the stop pin 24;. By this means the inner plug section 23may be rotated in unison with the plug and consequently'the cam arm 21-may be rotated counterclockwise as viewed in Fig. 7 to enable said camarm to engage the dead-locking member lug 25 and return the dead-lockingmember to its inoperative osition. Thereupon the "cam arm may be rotatedin-the. reverse or clockwise direction by the emergency key and thelatch bolt retracted. The lock, furthermore, may be provided with theusual independent knob spindles for independent operation of the latchbolt by means of the outer and inner knobs (not shown) respectively, theouter knob spindle operating the roll-back 29 i so which engages a latchoperating roll-back and centering yoke 30, said yoke being provided withguide stems 31 carrying springs 32 which operate between the heads 33 ofsaid stems and the guide'lugs 34 secured to the lock case. The innerknob spindle is provided with a roll-back (not shown) lying immediatelybeneath the roll-back 29 and also adapted to engage the yoke 30. The

roll-back 29 and consequently the outer knob may be blocked againstoperation in the usual manner by means of a dogging member 35 adapted toengage a notch 36 in said roll-back 29, said dogging member 35 beingoperated in reverse directions by the press buttons 37 and 38respectively and connectin member 39. g

ile we have herein 'describeda particular embodiment of our invention,it isv to be understood that the" same may be varied in details withinthe scope of the appended claims.

-What we claim is: Y

1. In a hotel corrider lock, the combina tated in one direction by j anyof a plurality of keys, including an emergency key, to retract the latchbolt when said dead-locking member is in inoperative position, means insaid cylinder to prevent rotation of said cam arm in the oppositedirection by any" except the emergency key, and means whereby said cam.arm may move said dead-locklng memher to inoperative position by suchopposite rotation of said cam arm. 1

2. In a hotel corrider lock, the' combination with aspring-p'rojected-latch bolt and a dead-locking member therefor adaptedto be operated from theinner side of the lock, of a locking cylinderadapted :to be, operated from the outer side of the lock having a camarm adapted to be rotated'in one direction by any of a plurality ofkeys, including an emergency key, to retract said latch bolt when saiddead-lockin memberis in inoperative position, a key operated plug insaid locking cylinder having means to prevent rotation of said cam armin the opposite direction except by the j emergency key, and

means on said-dea'd-locking member whereby said member may be thrown toi-noper-' ative position by such opposite rotation of said cam arm.

3'. In a hotel corrider lock, the combination with a spring-projectedlatch bolt, of a dead-locking member therefor adapted to be operatedfrom the inner side of the look, a locking Icyl-inder having "a lockingplug adapted tobe operated from the outer side of the look, a cam armcarried by said plug, 1

pin tumbler mechanism arranged to permit rotation of said arm in onedirection by any of a plurality of keys, including an emergency key, toretract the latch bolt, pintumbler mechanism' arrangedto preventrotation of said cam arm in the opposite direc tion by any except theemergency key,"'and meanson saiddead-locking member whereby said. membermay be thrown to inoperative positionby such opposite rotation .of saidcam arm.

1 r 4. In a hotel corrider lock, the combina-- tion with aspring-projected latch bolt and a dead-locking member adapted to beoper- .-ated from the inner side of the lock, "of a ceases lockingcylinderhaving a sectional locking locking plug to prevent rotation ofsaidcam arm in the opposite direction by any except the emergency key,means whereby said locking plug sections may be rotated in unison insaid opposite direction by the emergency key, and means on saiddead-locking member whereby said member may be thrown to inoperativeposition by such opposite rotation of said cam arm.

5. In a hotel corrider lock, the combina tion with a spring-projectedlatch bolt and a dead-locking member therefor arranged to be operated,fromthe inner side of the lock,

of a locking cylinder having a locking plug arranged to be operated fromthe outer side of the look, a cam arm carried'by said plug,

.means whereby saidcam arm maybe rotated in one direction by any of aseries of keys, including an emergency key, to retract the latch bolt, asleeve surrounding said locking plug havingtmeans to prevent rotation ofsaid cam arm in the opposite direction, except by said emergency key,means permitting rotation of said plugand sleeve in such oppositedirection by said emergency key, and means on said dead lockingmemberwhereby said member may be thrown to inoperative position by suchopposite rotation of said cam arm.

6. In a hotel corridor lock, the combination with a spring-projectedlatch boltand a.

"lockhaving a locking plug, a cam arm cara fried by said plug, pintumbler mechanism for said plug arranged to be operated by any one of aplurality of keys, including an emergency key, to permit rotationsofsaid arm in one direction, asleeve on said plug having a stop to preventrotation of said arm in the opposite direction, pin tumbler mechanismfor said sleeve arranged to be operated by said emergency key to permitrotation of said cam arm in either direction, and means on saiddead-locking member whereby said member may be thrown to inoperativeposition by said cam arm when rotated oppositely to said first mentionedrotation whereby said emergency key may first release said dead-lockingmechanism and then retract said latch bolt. 7

'7. In a hotel corridor lock, the combina tion with a spring-projectedlatch bolt,of a dead-locking member therefor arranged to be operatedfrom the inner side of the the opposite direction of any except theemergency key, means operable by the emergency key to release saidcylindrical plug whereby said key may operate said cam arm in eitherdirection, means on said deadlocking member whereby said cam arm maymove said member to inoperative position when said arm is rotated insaid opposite direction whereupon said cam arm may thereafter beoperated by said emergency key to retract said latch bolt.

8. In a hotel corridor lock, the combination with a spring-projectedlatch bolt, of a dead-locking member therefor, a roll-back .for saiddead-locking member, "a thumbpiece for said roll-back operable from theinner side of the lock, a locking cylinder upon the outer side of thelock having a locking plug carrying a cam arm adapted.

to be rotated in one direction by any of a plurality of keys, includingan emergency key, to retract'the latch bolt, means to prevent rotation'of said cam arm in the opposite direction by any except the emergencykey, and means on said dead-locking member whereby said member may bemoved to inoperative position by such opposite rotation of said cam arm.1

9. Inaliotel corridor lock, the combination with a spring-projectedlatch bolt of a" dead-locking member therefor arranged to beoperatedfrom the inner side of the lock, a locking-cylinder upon theouter side of the lock having a sectional locking plug, a cam armcarried by one'section of said plug, means for permitting the rotationof said plug section in one direction by any of a plurality of keys,including an emergency key, a normally stationary plug section havingmeans to prevent the rotation of said cam arm in the opposite direction,means cooperating with said second plug section adapted to be releasedby said emergency .key to permit simultaneous rotation of said first ands eoond'plug sections in either direction, and means on said deadlockingmember whereby said member may be moved to inoperative position byrotation .of said cam arm in a direction opposite to said first nameddirection-whereby said latch bolt maybe thereafter retracted by rotationof said cam arm in said first mentioned direction. r

10. In a hotel corridor lock, the combination 'with a latch bolt and adead-locking member therefor adapted to be operated from the inner sideof the lock, ofv a key controlled memberoperable from the outer side ofthe look by any of a plurality of keys," including an emergency ke to retract the latch bolt when said dea -locking member .is in inoperativeposit on, and key controlled means to prevent retraction of the latchbolt by said key controlled latch retracting member except by theemergency key when said -dead locking member is in operative position, b

11. In a' hotel corridor lock, the combine tion with a latch bolt and adead-locking member therefor adapted to be operated from the inner, sideof vthe lock, of a key controlled lever operable from the outer side ofthe lock to retract the latch bolt by any of a plurality of keys,including an emergency key, when said dead 1ocking member is ininoperative position, means to prevent retraction of the latchbolt bysaid lever except by operation of the emergency key when saiddead-locking mem mg a cam arm arranged to be rotated-by any of aplurality of keys, including an emergency key to retract the latch boltwhen said dead-locking member is min-- operative position means toprevent operative rotation ofsa1d cam arm by anyexcept the emergency keyto retract the latch bolt when said dead-locking member is in opera;.tive position, and means whereby said cam armmay be rotated by saidemergency key to throw said dead-locking member to inoperative positionand thereafter permit retraction of the latch bolt by" said cam arm.

13'. In a hotelco'rridor lock, the combination with a latch bolt and adead-locking member therefor o erable from the inner side of the lock, 0a locking cylinder on the outer side of the lock, having a cam armarranged to be rotated by any of a plurality of keys; including anemergency key bitted to retract the latch bolt when said dead-lockingmember is in inoperative positionfmeansin said cylinder to preventrotation of saidcam arm to vretract the latch bolt by any but theemergency key"( when said dead-locking member is in operative positionsaid emergency key being bitted to control said last mentioned means topermit rotation of said cam arm to throw said dead-l ockingmember toinoperative position.

. v I AUGUST'ARENS. ERNEST .TEIOH. Witnesses: i

i G. ERNEST Roo'r, WM. V. CoL vI v.

